Movies:
* The Last Samurai (2003) - As a young samurai, this was his international breakout role.
* The Grudge 2 (2006) - Played the role of Toshio Saeki.
* The Fast and the Furious: Tokyo Drift (2006) - Played DK, Han's friend and Drift King.
* The Wolverine (2013) - Portrayed Shingen Yashida.
* The Foreigner (2017) - Played the role of Ngoc.
* Pacific Rim Uprising (2018) - Portrayed Akihiko, a Jaeger pilot.
* Mortal Kombat Legends: Scorpion's Revenge (2020) - Voiced the character of Scorpion (voice only).
Television:
* The Shield (2004) - Played the role of Aki.
* CSI: Miami (2005) - Appeared in an episode titled "Deep Freeze."
* Hawaii Five-0 (2011) - Played the role of Jin in an episode titled "He Makia."
* Arrow (2013) - Played the role of Maseo Yamashiro, Tatsu Yamashiro's husband.
* Agent Carter (2015) - Reprised his role as Maseo Yamashiro.
* The Man in the High Castle (2015-2019) - Played the role of Tagomi.
Other:
* The Raid 2 (2014) - Played the role of Jaka.
* Mortal Kombat (2021) - Played the role of Scorpion.
This is just a small sampling of Seiji Fukushi's work. He has been in many other projects, including various TV dramas, short films, and video games. He is a versatile actor who has proven himself capable of playing both leading and supporting roles in various genres.